What causes bleeding from the left nostril?

Under normal circumstances, nosebleeds on the left side may be caused by trauma, dry nasal cavity, rhinitis, nasal polyps, or deviated nasal septum. It is recommended that patients seek timely medical attention at a正规 hospital and receive appropriate treatment based on their specific condition. Detailed analysis is as follows:

1. Trauma

When the left nostril experiences external impact, compression, or other forms of physical injury, it can easily damage the nasal mucosa or blood vessels. This kind of injury disrupts the integrity of the nasal mucosa, exposing blood vessels and leading to bleeding. Patients are advised to use a medical cotton swab to apply pressure to the left nostril to stop the bleeding. Additionally, applying cold compresses can help constrict local blood vessels and reduce bleeding symptoms.

2. Dry Nasal Cavity

Dry environments or insufficient moisture in the nasal mucosa can lead to dryness and fragility of the mucosal lining. Dry nasal mucosa is more susceptible to external irritation, which may result in cracking or ulceration, thereby causing nosebleeds. It is recommended that patients use a humidifier indoors to increase air humidity and drink plenty of water, both of which can help improve symptoms.

3. Rhinitis

Rhinitis causes congestion and inflammation of the nasal mucosa, increasing the likelihood of mucosal damage. Inflammation leads to swelling and engorgement of mucosal tissues, making blood vessels more fragile and prone to rupture and bleeding. Patients may follow medical advice to use medications such as mometasone furoate nasal spray, azelastine fluticasone nasal spray, or budesonide inhalation aerosol. Maintaining nasal hygiene is also important; rinsing the nasal cavity with saline solution can help alleviate symptoms.

4. Nasal Polyps

Nasal polyps growing inside the nasal cavity may damage surrounding mucosal tissue or blood vessels. If a polyp is located in the left nostril, it increases the risk of mucosal injury, especially when friction occurs within the nasal passage, potentially causing blood vessels to rupture and bleed. Patients can seek treatment at a正规 hospital through procedures such as endoscopic nasal polyp excision or sinusoscopic nasal polyp removal.

5. Deviated Nasal Septum

A deviated nasal septum may exert pressure or cause friction on the nasal mucosa, leading to mucosal tissue damage. When this deviation results in mucosal injury, blood vessels become more likely to rupture and bleed. Under medical guidance, patients may consider surgical treatments such as partial septoplasty, three-line tension-reducing surgery, or nasal septum correction surgery.

In daily life, it is recommended to maintain a positive mindset, avoid spicy, stimulating, and greasy foods, get adequate rest, and develop healthy lifestyle habits.